The Forster competition sizing die is probably the best single thing I have done for ammo consistency other than buying quality brass. I have not found much difference in the seating dies. Most do pretty well but I have never had any problems with standard, rcbs seating dies. As said the micrometer is cool, but not really necessary. I have heard of people polishing the inside of the seater stem with steel wool because it was marking bullets though I have never seen it myself.

I have never been a fan of Lee anything, but that is a personal issue and plenty use it.